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Iray: Using IES profiles to make a LED kaleidoscope?

ScavengerScavenger Posts: 2,674
in The Commons

The pictures below are of an LED kaleidoscope projector...you see them in the stores at Xmas....I'm trying to build something similar, using a sliced up sphrere primative and a many colored color map in the emission channel.  The problem I have is that emitted light seems to spread out too quickly, so it doesn't leave any patterns of color on objects it hits, just some vague colored illumination.

I'm thinking using an IES profile on the sphere might help this, from what very..very...REALLLY VERY little I understand about them....like using a LED profile would keep the beams less wide....

IF MY rambling makes sense, does anyone have some advice to illuminate the path?

Comments

  • ChoholeChohole Posts: 33,604

    What pictures?

  • ScavengerScavenger Posts: 2,674

    The pictures that 2:30 AM failed to remember to attach :(

    File May 07, 2 06 47 AM.jpeg
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    File May 07, 2 07 09 AM.jpeg
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  • hacsarthacsart Posts: 2,034

    well.. would it not be simpler to use a gel or gobo on a spotlight, and restrict the beamspread angle? Or do you need the bulb visible as well?

    sort of like this? This is one AofA advanced spotlight with a LED projection pic from the net as a gobo, scaled at 1, blur of 0. (and its in 3DL, as I don;t do iray)

     

     

     

    lighttest.jpg
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  • ScavengerScavenger Posts: 2,674

    Well, I need the 360 degrees like spread....which might be able to do with a spotlight now that I think..

  • JimbowJimbow Posts: 557

    If you model the LEDs with lenses, etc, then iray should render something like you see in the examples. I'd advise switching on the caustic sampler, too, as a test. If you give iray the proper model and shaders, it really does do a good job of emulating real world physics. It's all a matter of modelling and shading for PBR properly.

  • hacsarthacsart Posts: 2,034

    quick test AoA advanced spotlight - spread angle 360, inner angle 100, gobo scale 50%, gobob blur 0.  not perfect, but it does do the 360 spread. Might need some care in selecting a gobo gel image, perhaps one that tiles seamlessly would work better..

    Scavenger said:

    Well, I need the 360 degrees like spread....which might be able to do with a spotlight now that I think..

     

    lighttest2.jpg
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  • ScavengerScavenger Posts: 2,674

    That looks great...I'll have to see if i can pull off something like that in iray.

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